如何使tkinter对话框首先出现？

Question

I'm very new to python.

I've coded as follows. When user clicks the "Click button to setup CPE." button, the dialog window will appear and display the customer list.

My problem is that when the user clicks the "Click button to setup CPE." button, the Listing() function is working first. At that time the main window is dead. After finishing the Listing() , the dialog appears.

What can I do to make the dialog box appear first and display the info after the dialog box appears.

import Tkinter

class myWindow:
    addr = ''
    def __init__(self):

        self.mw = Tkinter.Tk()
        self.mw.option_add("*font", ("Arial", 15, "normal"))
        self.mw.geometry("+250+200")
        self.mw.title("Example of Custom Dialog-Window")

        # CPE
        self.btn_cpe = Tkinter.Button(self.mw, text = "Click button to setup CPE.", command = self.btnCPE)
        self.btn_cpe.pack(padx = 20, pady = 20)
        self.mw.mainloop()


    def btnCPE(self):

        self.dialogwindow = Tkinter.Toplevel()
        self.dialogwindow.title("Dialog Window")
        self.dialogwindow.geometry("+500+350")
        self.dialogwindow.maxsize(500, 350)
        self.dialogwindow.minsize(500, 350)

        self.lab1 = Tkinter.Label(self.dialogwindow, text = "Checking info")
        self.lab1.pack()

        self.lab_addr = Tkinter.Label(self.dialogwindow, text = "Address : ")
        self.lab_addr.pack()

        # Refresh
        self.btn_refresh = Tkinter.Button(self.dialogwindow, text = "Refresh", command = self.refresh)
        self.btn_refresh.pack()

        self.btn_cpe_exit = Tkinter.Button(self.dialogwindow, text = "Exit", command = self.dialogwindow.destroy )
        self.btn_cpe_exit.pack()

        # This is the important line: It tells the main-window to lock:
        self.dialogwindow.grab_set() 

        self.Listing()
        self.lab_addr['text'] = "address : " + self.addr;

    def Listing(self):
        # access the db and set the address into self.addr

Answer 1

Try this:

import Tkinter

class myWindow:
    addr = ''
    def __init__(self):
        # CPE
        self.btn_cpe = Tkinter.Button(mw, text = "Click button to setup CPE.", command = self.btnCPE)
        self.btn_cpe.pack(padx = 20, pady = 20)

    def btnCPE(self):

        self.dialogwindow = Tkinter.Toplevel()
        self.dialogwindow.title("Dialog Window")
        self.dialogwindow.geometry("+500+350")
        self.dialogwindow.maxsize(500, 350)
        self.dialogwindow.minsize(500, 350)

        self.lab1 = Tkinter.Label(self.dialogwindow, text = "Checking info")
        self.lab1.pack()

        self.lab_addr = Tkinter.Label(self.dialogwindow, text = "Address : ")
        self.lab_addr.pack()

        # Refresh
        self.btn_refresh = Tkinter.Button(self.dialogwindow, text = "Refresh", command = self.refresh)
        self.btn_refresh.pack()

        self.btn_cpe_exit = Tkinter.Button(self.dialogwindow, text = "Exit", command = self.dialogwindow.destroy )
        self.btn_cpe_exit.pack()

        # This is the important line: It tells the main-window to lock:
        self.dialogwindow.grab_set() 

        self.Listing()
        self.lab_addr['text'] = "address : " + self.addr;

    def Listing(self):
        print "hola"
        # access the db and set the address into self.addr

mw = Tkinter.Tk()
app=myWindow()
mw.option_add("*font", ("Arial", 15, "normal"))
mw.geometry("+250+200")
mw.title("Example of Custom Dialog-Window")
mw.mainloop()

& also,try not to include the UI part in the constructor. Tell me if it helps